684956471 has 8 divisors (see below), whose sum is σ = 698284800. Its totient is φ = 671643232.

The previous prime is 684956449. The next prime is 684956483. The reversal of 684956471 is 174659486.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-684956471 is a prime.

It is a super-3 number, since 3×684956471³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684956171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140330 + ... + 145128.

It is an arithmetic number, because the mean of its divisors is an integer number (87285600).

Almost surely, 2^684956471 is an apocalyptic number.

684956471 is a deficient number, since it is larger than the sum of its proper divisors (13328329).

684956471 is a wasteful number, since it uses less digits than its factorization.

684956471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7545.

The product of its digits is 1451520, while the sum is 50.

The square root of 684956471 is about 26171.6730645941. The cubic root of 684956471 is about 881.4973092865.

The spelling of 684956471 in words is "six hundred eighty-four million, nine hundred fifty-six thousand, four hundred seventy-one".